Mitosis is the cell division that occurs in tissue, through which two daughter cells are created with the same number and type of chromosomes as the parent cell. Meiosis is the cell division that sex cells undergo, which creates four daughter cells containing only half of the number of ...
When alpaca wool is spun into yarn using the indigenous methods that are still common in Peru and other countries, a variant of a drop spindle called a "pushka" is commonly used. This device looks similar to a spinning top, and it uses gravity to combine multiple carded wool fibers into ...
The images show the microtubule-based spindle fibers (red), chromosomes (blue), and their kinetochores (green). Microtubules align chromosomes in the middle of the spindle in the presence of the newly discovered protein called BuGZ (+BuGZ), but mis-aligned in its absence (-BuGZ). Chromosome ...
In humans, what is the role if the gastrocnemius and would you expect the gastrocnemius to have a predominance of one type of fibre? Describe how skeletal muscle fibers become multinucleated. a. Describe the structure of the intercalated discs. b. What is the functional importance of the inter...
What happens in anaphase in animal cells? Anaphase: Spindle fibers shorten, the kinetochores separate, and the chromatids (daughter chromosomes) are pulled apart and begin moving to the cell poles. ... It is in this region that a contractile ring cleaves the cell into two daughter cells. How...
Inprometaphase, the chromosomes line up through their centromeres along the line of division, also called the metaphase plate. The microtubule spindle fibers connect to the centromeres at a location called thekinetochore. Following metaphase proper (discussed in detail shortly) isanaphase. This is ...
a proper spindle, and very large cells could not coordinate their divisions during cleavage. This idea is elaborated in essays by Frankel and by Kimura, who discuss the apparent upper and lower limits on cell size with respect to cell division machinery. Finally, in both animals and plants, ...
Metaphase is the second phase of mitosis. During metaphase, spindle fibers attach to thecentromereof each pair of sister chromatids. The sister chromatids also move into the middle of the cell and line up along an invisible line, called themetaphase plate. These spindle fibers prepare the siste...
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In the first, the plant creates no trunk, just a single rosette with increasing numbers of elongating leaves. After a number of years depending on site conditions, the plant develops a stem with a single rosette at the top. In the last stage, the crown branches after first flowering and ...